Window ventilating lock



Jul 17, 1951 E K I 2,566,666

WINDOW VENTILATING LOCK Filed April 26, 1949 IN VEN TOR.

Patented July 17, 1 95f oF-Fici:

2,560,656 I V WINDOW vEN'rmnrimc-znoox Samuel H; Melnick,.Chicago, III.

ApplicationApriL-ZG, 1949; seria1 No. 8954- struction Which employs no-- springs or spring" arrangements to lock the. locking member in place:

' Another-object of'my invention is to provide a window ventilating lock which cannot be-moved to-the 1 unlocked position i from the outside of the window;

Another object is to provide awindow ventilatinglock whichncannotubeideflected to the-unlocked-{position even when the window is raised suddenly and with such great .force thatparts of he. QQ areent:

, Anothen biect istoprovide. a, window Ventl-z lating lock which is inexpensive to manufacture;

easy .to install, neatin appearance, and con..-.. venient to i use.

when installed on a window of conventional lower sash; The rod is further adapted toturn.

on its longitudinal axis to various positions, and. when inone position can be inserted within an edgeopening in the edge-of the arm. When the rod -isthen turned on-its longitudinal axis: to" a-second position,--it is locked securely to the arm and cannot be moved to the unlocked position until-such time as the rod is rotated back to the original position or an alternate. position corresponding thereto;-

disclosed, reference is had to the-accompanying:

drawing whichillustrates oneformsof apparatus embodying the foregoing and such other principles, advantages or capabilities as may be pointed out: as: this .x description proceeds; or as are --inherentin the present invention. For purposes of clarity in exposition, the following description is explicit, and theaccompan-ying drawing is detailedpzlput it is distinctlyi -tdvbe; understoodathata said exposition is illustrative.0n1y;- and i that; my invention is not restricted to the particular 3' Claims. (Cl. 292-202 details: reci-ted in the specification or shown iri the drawing;

In thesdrawing:

Figure; 1 is; a fragmentary perspective" View showing one'embodim'ent of my invention-as it appears'when installed on a window of conventional design and when placed in the locked position;-,.

.Eigune Z'is a front elevational view of the embodiment of Figure 1,. with the stop-member in' the unlocked position;

Figure 3 is a. front elevationalview with the stop member: in the'lcck'ed position;

.. Figure-Aisaplan elevational view as per Fig Figure-5 is a plan elevational view as per Fig-- ure. 3; and;

.Figure 611s a side elevational view as per Fig-- uress3 and 5;

Likezr'eferenoe numerals designate like parts inzthedrawing gand in the description thereof followinghereafter.

Referring inow -to-the drawing, the embodiment shown includes a plate ll] having a plurality of counter:- sunkz-openings lltherein. whereby the plate ill -may be readily fastened by screws Ila. to. a verticaldedge lZ of the upper sash of a window (Figure ll When theplate In is, fa's tenedito the ledge I2 in-this manner, the arm I3 projects free ofthe ledge l2. S'ecured'tdthe arm [Bland adapted-to lie adjace'nt'the'wiiidow glass member l5 (Figures 4 and 5). The leg l6 of the bracket member l5, and the arm 13 contain an edge opening, I! comprised of a substantially circ'ularportion I8, and a throat E9 the width of which'is less'than' the internal diameter of the circular-portion l8. v7 I v Projecting from the'leg 2 Wof-thebracket meniber l5,are-'two ears 2| and 22". 2l*and;22 is-substantia1ly perpendicular to the"- arml3-andextends toward said arm. Each of the ears- 2l and 22 is-further characterized by a cen"-" tral openi-ng 23' which pivots one'of thepivot lugs.

24I-that extend from opposite ends of the link 25.

A'rod -26 is rotatablysecure'd'to the link 25,'and forms astop' member which is adapted to overlie the upper ledge. 21 of the lower' sash of; the:

windows" Asis best shown in Figures2 and 4, the rod-26'1-is '-provided with a 'pair of substantially para-llel flats 28; 28 intermediate-the end fixed to thelink 25 andthe knurled-end 29;

The-pivot" connection between the link 25'and the ears. 2 land: 22' permits turning therod' 2 errom. the position of Figure 4 to that shown in Figure 5i I4 is a Substantially U-Shaped bracket Each-of the ears" When the rod 26 is rotated on its longitudinal axis to the position of Figures 2 and 4, the effective thickness of the rod 26 is reduced by the flats 28, 28 sufficiently to permit the rod 26 to traverse the throat portion IQ of the edge opening I1 and enter the circular portion 18. By then turning the rod 26 on its longitudinal axis, into the position shown in Figure 5, the effective thickness of the rod 26 is increased to the normal diameter of said rod. When my window ventilating lock is placed in this latter position, it is apparent that the rod 26 is securely locked to the arm I3 and cannot move through the throat portion l9.

When the rod 26 is in the locked position, it overlies the upper ledge 21 and permits the lower sash of the window to be raised only a short distance. Or, conversely, the upper sash of the window can be lowered until the rod 26 contacts the upper ledge 21. When the window is thus opened, the rod 26 cannot be moved from the locked position by inserting a blade between the upper and lower sashes and pushing the rod 26 to one side. Furthermore, should the window be raised suddenly, or for any other reason considerable upward or downward force be exerted on the rod 26, my novel locking arrangement prevents defiection of the rod 26 to the unlocked position.

In addition, my invention is characterized by unusual strength and durability. These characteristics are due in large measure to the fact that the plate [0, which can be made very strong and rigid against bending, braces the rod 26 and takes the brunt of the load imposed on said rod 26. Thus the pivot means assume only a small portion of the load, rather than the entire load as in the case of the conventional prior art window ventilating locks. If unusually large loads are imposed upon the rod 26, the lock still will not fail, even though the ears 2| and 22 are bent. In the case of the prior art devices, any bending of the pivotal supports of the locking member almost invariably results in the locking member being broken from the rest of the window lock.

Advantageously, my construction lends itself well to low cost mass production, since all of the parts may be stamped or made on screw machines or other automatic machine tools.

Having thus fully disclosed my novel window ventilating lock, and demonstrated its utility by reference to a specific embodiment thereof, I claim:

1. A window ventilating lock, comprising: a bracket adapted to be fastened to a window frame and including a plate portion adapted to project free of said window frame, a substantiallly U-shaped arm one leg of which abuts said plate portion, said leg and said plate portion in abutment therewith having a common edge opening comprising a substantially circular portion and a throat portion extending to said edge, the width of said throat portion being less than the internal diameter of said circular portion, a pair of ears extending, respectively, from opposite edges of the other leg of said U-shaped arm and toward said plate portion, a link pivotably secured to and disposed between said ears, and a rod projecting from said link and pivotably secured at one end thereof to said link, the diameter of said rod being only slightly less than the internal diameter of said circular portion, said rod having two substantially parallel flats thereon so proporace esc 4 tioned and arranged that said rod may be swung through said throat portion into said circular portion, whereby rotating said rod relative to said link locks said rod to said plate portion, said rod being of a length such that the free end thereof projects beyond said plate portion. 2. A window ventilating lock, comprising: a bracket adapted to be fastened to a window frame and including a plate portion adapted to project free of said window frame, said plate portion having an edge opening comprising a substantially circular portion and a throat portion extending from said edge to said circular portion, the width of said throat portion being less than the internal diameter of said circular portion, a link and means hingedly securing said link to said bracket for rotation about an axis spaced from and substantially parallel to said plate portion, a rod rotatably secured at one end thereof to said link, the longitudinal axis of rotation of said rod being substantially perpendicular to the axis of rotation of said link, the diameter of said rod being only slightly less than the internal diameter of said circular portion, said rod having intermediate the two ends thereof two substantially parallel flats whereby said rod may be turned to traverse said throat portion, and whereby said rod may be locked to said plate portion upon turning said rod so that said flats are misaligned with the sides of said throat portion. 1

3. A window ventilating lock, comprising; a bracket adapted to be fastened to a window frame and including a plate portion adapted to project free of said window frame, said plate portion having an edge opening comprising a substantially circular portion and a throat portion extending from said edge to said circular portion, the width of said throat portion being less than the internal diameter of said circular portion, a link and means hingedly securing said link to said bracket for rotation about an axis spaced from and substantially parallel to said plate portion, a rod rotatably secured at one end thereof to said link, the longitudinal axis of rotation of said rod being substantially perpendicular to the axis of rotation of said link, a portion of said rod intermediate the two ends thereof having a first dimension in one plane which isonly slightly less than the diameter of said circular portion, and a second dimension at substantially right angles to said first dimension which is less than the width of said throat, whereby said rod may be inserted in said edge opening upon turning said rod so that the smaller dimension of said rod portion is aligned with said throat, and whereby said rod may be locked to-:said plate portion upon turning said rod approximately degrees.

SAMUEL H. MELNICK.

REFERENCES CITED The following references are of record in the flle of this patent:

UNITED STATES PATENTS Number Name Date 830,672 Orum Sept. 11, 1906 1,196,356 Hachmann Aug. 29, 1916 FOREIGN PATENTS Number Country I 2 Date 734,628 France Oct. 25, 1932 

